Grinding-machine.



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' .struction UNITED 'STATES PATENT ABRAHAM LANms, F WAYNESBORO, PENNsrLVANIA.

GBINDING-IMHINE.

Application lled December Toall whom it may concern.-` v Be it known thatl I, ABRAHAM B. Laimls, a citizen of the United States residing at Waynesboro, in the county .of nklin and State of Pennsylvania, have invented certain new and useful Improvements in Grindin Machines, of which the following is a spec cation.

My said invention consists in certain improvements in the details ofeonstruction of `the 'mechanism for automatically operat' -wheel feed-mechanism of grin ing machines, itconsiating -chielly in detail improvements in .that icular construction shown in my Patent No. 654,3140! July' 24, 1900, whereby the operation of the autojmatic feed mechanism as rendered positive regardless of the weight and character of the work, 'all as be hereinafter more'fully de- Refernng' tothe accom an" `1 `which re made a. art hexyaofyalli'onvwhic similar vreference c rectel-s-indicate similar parts, Figure 1 is Ia side elevation of one endv wheerdrriage 'and the automatic operating mechanism, Fig.' 2 a horizon through the carriage on the dotted'. e 2 -2 in Fig. 3, Fig, 3 a crosssection tlu'ough the f so carriageand a portion of the bed on the dotted linee-ae 2, Fig. 4 a detail view onanenlarged scale showing the automatic feed mechanism artly in elevation and partly in section, 'and l5-a sectional viewon an 'enllrgd silloff at the lower end of Fig. landonthe dotted lline s-5 in Fig-2. In said tlioportions markedA represent the had of the machine, B the-carriage, C the slide on said voare,'and D the slider4 mounted on said slide V an grinding-.wheel base. 4.All .fof-said are ormayfbe of the same conent as shown in my patentabove referredto, thecarriage 3B being mounted to traverse back and forth u on suitable ways on the top ofgbed' A, the vsli e C being mounted on carriage B for. the slider D, which carries grinding wheel. The slider D isfed to 'the work `by v'5o sthe 'semearrangement 'of mechanism ,illus-r eared thereto having a handwheel 3 u' igts outer end by which it may be operatefliy hand and a gear wheel 4 geared to a second snrftshsvingsmhsewieeiemadwb.

I spacincation or Letten Patent.'

ding machine showing the'g'rinding.

section'V Panam-Feb. 1s, 190s.

1.1m, sem No. 34ans.

operated by apawl ,7 pivoted on a vertical P,

2 by an arm or bracket 11.`

hus far the mechanlsm 1s of the same arass own and described in my patent above .referred to and is `shown herein merely to illustrate the use and'operation of m present invention'which relates wholly to t e means for-'operating said-plunger 8 4at each reversal of the carriage. Said mechanism consista of screwaontlie ofa nger 13, Said ger is mountedtotgslidelilna .vertical beariulld' cated and has a shaft or pin=16 near theu the inner en of said bar 20, ing adapted to contact with said bar. (Near the opposite snd of 'said bar 20 downwardly u' l said carri B with their` ad`acent in line with', eadjacen't edges ol .the lugs and b and-are conliedted'by a-strap b* secured to their lower ends by screws b, thus forming' a loop which is ada ted to carry-and suppo formed with a 4downwardly rejecting flange f which overhang!! the top bearing 14 and as be readily understood. Its to surn face is formed with sufficient area so t at it will at all timesA be under the lower end of plu r 8 regardless of the adjustment ofthe ing wheel carnage.

which is mounted' a suitable perfbrltim in. y carriae B in a position directly beneath tha V norm of said' plunger 8. lower en rof saidunger 13 is formed tween said rollers 15 and' 18 andV ofjbed yA. Lugs b and b are formed la shortv .distance apart l011 'the inner angeof the car` nage B end projeot inwardlym each side of ung 8 mounted in a suitable casing 9 carned m the casing 10 surrounding the shaft Lan ran ment and operates in the same manner abearin'g l2 rigidly secured by la sat-A ro ect b and 'b3` are formed on the unerlsidel llio thlsend of said ar 20. The ,plate 12'is" lthus rotects said .bearing from dirt'and grit er l5 mounted on a end of said fumation.- The vertical s ve or bearing `14 is also bifurcated at its lower endv and has a 4 'v slip underany Weight of load which may be brought to the mechanism.

` Sai(v '1am c* throws the end of bar 19 upwardly 'carriage Bl travels in the reverse direction a In operation, the parts as shown in Fig. 2 are in normal position when the carriage is traveling in the direction indicated by the arrowin saidfigure. The double-faced cams c and c on the bar 19 are close to the outer faces of the rollers 15 and 18 and the plunger 8 is resting upon the plate 12 with the grinding-wheel feedfmechanism at rest. When the carriage B reache,y the limit of its travel in one direction and starts in the reverse direction Athe ,lugs l) and b3, which have been' rcstin against the adjacent edge of trans-- verse ar 20,1move away 'from said bar and as the luga b and 'b2 are at a distance from the opposite edge of said bar, said bar stops in its movement and as the carriage moves, the barv19 pulling upon the opposlte end of said bar 20,]will operate to cramp the fiange 21 inthe groove c, on the bed which Will hold said bar 20 and said bar 19 locked in this position. he carriage will therefore carry the bearing 14 and the plate 12 in the reverse direction independent of said bar 19 causing the rollers 15 and 18 to pass over the cams c and c.

and elvates cam c at the same time roller 15 is riding over it, thus giving the plunger 13 and the plate 12 carried thereby a quick upward movement operating the plun er S and, through the mechanism connected t erewithL the grindmg-wheel feed-mechanism, in exactly the manner as described in my former patent above referred to. As soon 'as the sufficient distance to bring the lugs b and b2 against the adjacent edge of the bar 2O said bar is immediately brought into a right-ang lar osit-ion, when its flange 21 will be arallel witli the groove c and said lugs will then freely carry said bar 20 and the parts con` nected therewith along with the vcarriage u1 1- til the limit of its motion in this direction is reached. When the carriage reverses the operating bars 19 and 20 are againlocked temporarily in position, the rollers pass over the cams on the end of bar 19 and the Agrinding- Wheel feed-mechanism again operated to move the grinding wheel into the work, all m the same manner as before.

By this construction a very positive locking means is secured and one which will not It will be understood that the cams c and c( are arranged as shown and described on bar 19 to secure an upward movement of plunger 13 equal 'to the pitch of both cams, but that the same result can be secured by a single cam of double the height of one of these, or by other suitable forms.

ll t will be understood, of course, that the automatic-feed mechanism may be varied in -form and arrangement from that shown herein, without ydeparting from my invention, which relates only to the particularl means for operating it and may be used in connection with any feed mechanism for which it is adapted.

Having thus fully described my said nrvention, what l claim as new and desire to secure by Letters Patent, is

1. In a grinding machine, the combination with the automatic feed mechanism, of

vmeans for operr: g the same comprising a vertically mov uole table carried by the carriage, a double faced cam for operating said movable table adapted to move with said carriage during the greater extent of its movement, and means for locking said cam momentarily at each reversal of the movepienlt'of said carriage, substantially as set ort i. 4

i). In a grinding machine, thecombina-A said carriageat each reversal of said carriage` 90 substantially as set forth.

3. ln a grinding machine, the combination of the automatic feed mechanism, means for operating the same, comprising a part carried by a plunger mounted to slide in suitable bearings in the carriage, a cam adapted to operate said plunger and mounted to move with said carriage, and means for locking said cani at each reversal of the movement of said carriage, substantially as set forth.

4. ln a grinding machine, the combination with the automatic mechanism for feeding the grinding Wheel to the work, means for operating said mechanism at each reversa of the movement of the carriage, comprising a part carried by a plunger mounted in one end of said plunger, a cam mounted to move with the carriage and adapted to be locked to the bed of the machine momentarily at each reversal of said carriage, whereby said roller will pass over said cam and operate said plunger, substantially as set forth.

5. ln a grinding machine, the combination of the mechanism for'feeding the grind ing wheel automaticallyA to the work, means for operating said mechanism comprising a part carried on a plunger mounted in a bearing in the carriage, said plunger having a roller journaled thereon, said bearing having another roller journaled therein a short distance from said first roller, a bar having a double faced cam on. each edge mounted between said rollers, said bar being mounted to move with said carriage throughout the extent of its traverse yback and forth, and means for locking said bar to the bed of the machine momentarily at each reversal of the traverse of the carriage, substantially as set forth.

6. 'In a grinding machine, the combination of the mechanismwffor feeding the grinding wheel automatically to the work` means for operating said mechanism, comprising a plunger mounted in a bearing in the carriage, a roller carried by said plunger, another roller carried by said bearing, a part provided with a double-faced cam on each edge mounted between said rollers, said part being mounted and normally carried by said carriage, and means for locking said part t0 the bed of the m aohine momentarily at each reversal of the carriage, whcfehy said carriage moves to carry said rollers `over said cams and operate said plunger', substantially asset forth.

7. In a grinding machine, the combination of the automatic feed mechanism for the grinding wheel, and means for operatin said mechanism, com rising a part mounte on a plunger mounte in a bearmg in the carriage, a cam mounted to move normally with said carriage and arranged adjacent to the Alower end of said plunger, said )art being hinged to a transverse bar mounted between lugs a distance apart greater than the width of said bar and having a down-turned flange ad apted to engage with a longitudinal groove in the bed of the machine,l whereby as the carriage reverses said flange will cram. in said groove during the movement of tie carriage to bring the opposite lugs against the transverse bar, substantially as set forth.

is. ln a grinding machine, the combination with the automatic mechanism, operating' mechanism for feeding the grinding wheel or mechanism for operating the same, comprising a plunger mounted in a bearing in the carriage, a cam adapted to move with the carriage throughout its movement back and forth, and means for llocking said cam to the bed of the machine temporarily at each reveiisall of the movement of the carriage,

whereby said cam will stand stationary momentarily while the lunger moves over it and is operated there T, substantially as set forth,

9. In a grinding machine, the combination of the automatic feeding mechanism for the grinding'wheel, ar d means for operating thev same, comprising a plunger mounted in a bearing in the carriage, a bearing face at the lower end of said plunger, another bearing face on the bearing, a double-faced cam adapted to operate between said bearing faces, me ans for carrying said cam back and forth with the carriage, and means for lock-` ing said cam temporarily in a stationary position at each reversal of the carriage, sub stantially as set forth.

10. In a grinding machine, the combina# tion, of the bed, the carriage, means for. traversing said carriage, the grinding wheel, and means for feeding said grinding wheel automatically to the work comprising a plunger mounted in the carriage, a cam carried by the carriage, means for locking said cam momentarily'to the bed at each reversal of the carriage, and means for releasing it after the plunger has ridden over it.

11. In a grinding machine, the combination, of the bed, the carriage, the mechanism for automatically operating the feed mechanism comprising a cam mounted to normally move with said carriage but to have a limited inde Arendent movement, means for. locking sain cam stationary at eachreversal of the carriage, and means for releasing it after it has operated the mechanism, substantially as set forth.

In witness whereof, I, have hereunto set` [L. s.] I 

